To extract content  from the database

To design and visualize database

To create a graphical user interface

A lot of different values

A null value

An unique value

YES

NO

By using HTML

By using JavaScript

By using Structured Query Language (SQL)

By using PHP

Where

Order by

From

Select

DDL

DML

Query Language

All of the mentioned

Add columns

Add constraints

Delete columns

Delete constrains

All the above

DELETE FROM table_name;

DELETE TABLE table_name;

DROP TABLE table_name;

None

DELETE COLUMN column_name;

DROP COLUMN column_name;

ALTER TABLE table_name DROP COLUMN column_name;

None is correct.

Create command

Drop table command

Alter table command

All of the mentioned